Answer:

testator

Answer	Crossword Clue
TESTATOR	Willing participant?
TESTATOR	One with a will
TESTATOR	One who leaves a will.

TESTATOR	Maker of a will.
TESTATOR	Will-maker.
TESTATOR	Will-maker
TESTATOR	Person with a will
TESTATOR	One who makes a will
TESTATOR	His will is his way
TESTATOR	One leaving a will
TESTATOR	Legator

TESTATOR	Willful one?
TESTATOR	Person with an estate
TESTATOR	One with will power?

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.